dynamically created radio buttons

[Mike P]

I am working with some code where a number of contacts are taken from a
table and then added to a page with a radio button to the right of each
one where the name of each radio button has the contact key appended.

RadioButton rbtn = new RadioButton();
rbtn.ID = "btn" +
ds.Tables[0].Rows[i]["ContactKey "].ToString();
rbtn.GroupName = "Group1";

rbtn.CheckedCha nged += new
EventHandler(rb tn_CheckedChang ed);

if (ds.Tables[0].Rows[i]["PrimaryContact "].ToString() ==
"y")
{
rbtn.Checked = true;
}

pnlContactList. Controls.Add(rb tn);

How in the rbtn_CheckedCha nged event do I obtain the Id of the radio
button that is selected?
Cheers,

Mike

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[Marc Gravell]

You can normally cast the "sender" to the Control (RadioButton in this case)
firing the event; best to do it defensively:

RadioButton rb = sender as RadioButton;
if(rb!=null) { // have a valid RadioButton
// do something with rb
}

Marc

"Mike P" <mi*******@gmai l.com> wrote in message
news:eR******** ******@TK2MSFTN GP04.phx.gbl...

I am working with some code where a number of contacts are taken from a
table and then added to a page with a radio button to the right of each
one where the name of each radio button has the contact key appended.

RadioButton rbtn = new RadioButton();
rbtn.ID = "btn" +
ds.Tables[0].Rows[i]["ContactKey "].ToString();
rbtn.GroupName = "Group1";

rbtn.CheckedCha nged += new
EventHandler(rb tn_CheckedChang ed);

if (ds.Tables[0].Rows[i]["PrimaryContact "].ToString() ==
"y")
{
rbtn.Checked = true;
}

pnlContactList. Controls.Add(rb tn);

How in the rbtn_CheckedCha nged event do I obtain the Id of the radio
button that is selected?
Cheers,

Mike

*** Sent via Developersdex http://www.developersdex.com ***

[Mike P]

Thanks Marc, that works perfectly.

I've never really used the 'as' keyword...is this just an alternative
form of casting?

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[Marc Gravell]

The "as" operator returns null if the cast fails (e.g. sender is a TextBox),
where-as a straight cast would throw an exception.

The main reason I started using it is that FxCop kept moaning about
performing the cast twice when following the "test via is, then cast"
approach; "as" covers both of these in one, easily tested, step.

Marc

"Mike P" <mi*******@gmai l.com> wrote in message
news:eD******** ********@TK2MSF TNGP04.phx.gbl. ..

Thanks Marc, that works perfectly.

I've never really used the 'as' keyword...is this just an alternative
form of casting?

*** Sent via Developersdex http://www.developersdex.com ***